Just recently Apple came out with iTunes 12.1 for OS X Yosemite users. The update comes with a number of new features and bug fixes to improve the overall user experience.
The one notable new feature in this update is that iTunes now comes with an option of a Notification Centre widget for OS X Yosemite users. The widget enables you to control the music playing, in a somewhat similar way Control Centre in iOS lets you control the music playing.
Apple also states that the update improves the reliability and performance of syncing your iOS devices.
In order to get this update, open the Mac App Store and go to the “Updates” tab.